Pump



NOV. 16, 1943. E, A, ZADIG 2,334,525

PUMP

Filed July 11, 1942 s sheets-sheet 2 I :1.4. BYQ INVENTQR ATTORNEY NOV. 1.6, 1943.l E A, 2AD|G 2,334,525

PUMP

Filed July 1l. 1942 5 Sheets-Sheet 3 if J '55 57 [53 k/ INVEN-r'on ATTORNEY Patented Nov. 16,` 1943 UNITED STATES PATENT `OFFICE *I 2,334,525

PUMP arnesi-.14. zaaig, Nrwalk, conn. Application Ju1y'1'1', 1942, serial No. 450,495 4 claims. (o1. ina-148) This invention relates to pumps, and pertains more particularly to hand operated liquid pumps of a type particularlyadapted for household uses such as emergency fire protection, garden spraying and the like. l l

It is an object of the invention to provide a pump which is simple in construction, inexpensive to manufacture, and'easy to operate.

It is a further object of the invention to provide a pump which can be constructed chiefly of wood and other materials which are readily available at the present time.

Other objects and advantages of the invention will appear hereinafter.

' A preferred embodiment of the invention selected for purposes of illustration is shown in the accompanying drawings, in which,

Figure 1 is a perspective view of the pump.

Figure 2 is a top plan view of the base with the bellows and bellows operating block removed. l

Figure 3 is a section on the line 3 3 of Figure 2.

Figure 4 is an enlarged section on the line 4 4 of Figure 3. l

Figures 5 and 6 show a modified form of'valve construction, Figure 5 being a section on the line 5 5 of Figure 6, and Figure 6 being a section on the line 6 6 of Figure 5. I

Referring to the drawings, the pump comprises a base I having an extension 2 serving as a platform on which the operator may stand while operating the pump. Mounted on the sides of the base I are a pair of vertical standards 3 on which is pivotally mounted a block 4. The said standards are provided with aligned apertures therein to receive the trunnions 5 located centrally on the block 4 and supporting said block in spaced relation to the base. Extending vertically upwardly from said block is an operating handle 6 by means of which the said block may be oscillated.

Mounted in the space between the base I and the block 4 are a pair of collapsible bellows 'I and 8, which, in the preferred embodiment illustrated are roughly cylindrical in shape. Each of said bellows comprises a disk 9 secured to the underside of the block 4 near the end thereof, a disk l 0 secured to the topside of the base I, and a tubular member II of exible material forming a co1- lapsible wall therebetween. Each of the disks 9 and I0 is provided with an annular groove in its outer periphery and the ends of the tubular member may be secured therein by baling wire I2 or other suitable clamping device. If desired, a suitable adhesive may also be applied as an additional precaution against leakage.

Anfinta'ke passage I'is formed in the base I, said passage extending through the base from an edgethereof and having branch passages I4 and I5 extending vertically and aligned with apertures IB inthe disks I0 to provide communication with the interior of the bellows "I and 8. Valves I'I seating against the rtop surfaces ofnthe disks',` I'U serve as intake valves permitting liquid to flow into the bellows, butpreventing outiiow.

A similar disclfiarge,passage I8 is also Iformed yin the base I, parallel to the passage I3 and having branch passages I9v and 20 4extending verticallyand aligned with apertures 2l in the disks IIJ toprovide communication with the interior of the bellows l and 8. Inverted valves 22, seating against the under surfacesof the disksY I0 serve as discharge valves permitting liquid towilow out of the bellowsbut preventing inflow. Each of the valves I'I and 22- may vbe providgyedfwitha light spring 23 urging the valve toward its seat.

At thea-mdl ofk each of the passages I3 and I8 is a nipple 24, 25 servingas a convenient i'riearisufr lattachment ofatube or hose (not shwi). The hose connected to nipple 424 ywould be' l'e'd t a source of. liquid supplygf course, andv thehose connected to nipple 25 i'riay be provided 'with Va suitable dischargel noazle. v

In operation, the operator 'stands on the Vplatform 2, and moves the handle back aiid forth to oscillate the block 4, thehandle being within 'easy Areachof the operator standing on the platform. Because of the convenient/ position of the handle 'and the leverage provided, the pump can easily be operated with one hand, leaving the other hand free to hold and direct the discharge nozzle. Oscillation of the block 4 collapses and expands the bellows 'I and 8 in alternation, the bellows 1 being collapsed while the bellows 8 is being expanded and vice versa. Whenever one of the bellows is expanded, its intake valve is open and its discharge valve is closed, and whenever one of the bellows is collapsedits discharge valve is open and its intake valve is closed. Thus, the pump is double acting and a continuous flow of liquid is provided.

The base I, the standards 3, the block4 and its trunnions 5, the handle 6, disks 9 and I0, and Valves I'I and 22 can all be made of wood which is light, cheap and plentiful. The tubular member Il may be made of any suitable material which is strong and flexible, as for example, a woven textile material such as heavy duck, preferably treated by known methodsk to increase its water resistance.

In the modied form illustrated in Figures 5 base in spaced relation and 6, ball valves are used in place of the mushroom valves previously described. In this case the intake valves 3| are located in valve chambers 32 formed in the base I, and each valve seats against the rim of a branch passage 33 communicating with the intake passage I3. Above the chamber 32 the disks l0 are provided with a plurality of passages 34 communicating with the interior of the bellows. Discharge valves 35 are located in valve chambers 36 formedin the disks I and seat against the rims of the passages 31 communicating with the interior of the bellows.

A plurality of branch passages 38 communicate with the discharge passage I8.

The intake valves are made of material such having a specic gravity; that they are caused to as glass, for example, greater than water, so Y seat by their own weight. rIhe discharge valves 35, on the other hand, are made of material such as wood, for example, having a specific gravity less than water, so that they tend to float upwardly to seat against the rim of the -passages 31. In this mannervthe use of valve springs may be dispensed with.

By using bellows having a diameter of approximately 3" and a handle approximately 3 long operated a distance suiiicient to cause the ends of the block to move through an arc of approximately 2, a copious flow of liquid may be induced with veryv little effort, the losses due to mechanical friction being negligible as compared to those encountered in piston type pumps.

It will be understood that the invention may `be variously modified and embodied withinthe scope ofthe subjoined claims.

I claim as my invention:

1. A liquid pump comprising, in combination, a base, a block pivotally mounted above said base in spaced relation thereto, a pair of collapsible bellows each having one end connected to saidv base and another endconnected to said block and adapted to be collapsed and expanded in alternation by oscillation of said block, said' base being provided with valve controlled intake and discharged passages communicating with the interior of both of said bellows, and said base having an extension serving'as a platform on which the operator may stand.

2. A liquid pump comprising, in combination, a base, a block pivotally mounted above said thereto, a pair of rcollapsible bellows each having one end connected to said base and another end connected to said block and adapted to be collapsed and expanded in alternation by oscillation of said block, said base being provided with valve controlled intake and discharge passages communicating with the interior of both of said bellows, said base having an extension serving as a platform on which the operator may stand, and an operating handle extending upwardly from said block for oscillating the same, said handle being within easy reach of an operator standing on said platform.

3. A liquid pump comprising, in combination, a base, a block pivotally mounted above said base in spaced relation thereto, a pair of collapsible bellows each having one end connected to said base and another end connected to said block and adapted to be collapsed and expanded in alternation by oscillation of said block, said base being provided with a straight intake passage extending longitudinally therethrough and having angularly disposed branch passages leading therefrom and communicating with each of said bellows, an intake valve in each of said branch passages controlling communication between said intake passage and one of said bellows, said base being also provided with a straight discharge passage extending longitudinally therethrough and having angularly disposed branch passages leadving therefrom andcommunicating with each of -with intake and discharge passages communicating with the interiorr of both of said bellows, intake valves controlling communication between said intake passage and each of said bellows, said Valves seating downwardly andbeing made of material having a specific gravity greater than Water, and discharge Valves controlling communication between said discharge passage and 'each of said bellows, said valves seating upwardly and'being made of material having a specific gravity less than water.

ERNEST A. ZADIG. 

